Efficient Protection Research Articles

Design, Synthesis, and Evaluation of Benzoxazine Copolymers for Anti‐Corrosion Coating Applications Based on Improved High Crosslinking Density and Hydrophobicity

ABSTRACTThe main‐chain benzoxazine (BA‐ddm) and diamine‐type benzoxazine (Ph‐hda) were prepared by solution method, and a series of copolymers were prepared by mixing them at various mass ratios. Second, copolymer coatings (P(PB)) were prepared on the surface of the tinplate by dip coating and heat curing. The results of FTIR and 1HNMR showed that the benzoxazine copolymer coating was successfully prepared. DSC test results showed that the copolymerization of two benzoxazine oligomers was promoted by the introduction of BA‐ddm containing phenolic hydroxyl groups. The introduction of Ph‐hda containing a long aliphatic chain provided the copolymer coatings with good hydrophobicity, as verified by the hydrophilicity and hydrophobicity tests. When the mass ratio of BA‐ddm to Ph‐hda was 1:19, the water contact angle and water absorption of P(PB5) were 100.10% and 0.56%, respectively. The results of dynamic polarization curves and electrochemical impedance spectroscopy (EIS) indicated that different copolymer coatings had good corrosion resistance. Among them, the P(PB5) coating exhibited the best anti‐corrosion performance, with a corrosion current of 5.15 × 10−8 A cm−2, a protection efficiency of 99.23%, and an impedance modulus of 1.78 × 107 Ω cm2 at 0.01 Hz, which was nearly 5 orders of magnitude higher than the impedance modulus of the blank tinplate.

Synthesis of O,F Co-Modified g-C3N4 for Photocatalytic H2 Evolution Activity Improvement and Corrosion Protection

Herein, we report the rational synthesis of porous g-C3N4 co-modified with oxygen (O) and fluorine (F) for the first time. Incorporating colloidal SiO2 during thermal polymerization introduces lattice oxygen, forming C–O bonds, while post-treatment with NH4·HF2 establishes C–F bonds. The dual incorporation of O and F elements extends visible light absorption and effectively promotes the separation and transport of photoexcited charge carriers. Consequently, the co-modified g-C3N4 (O,F-g-C3N4) achieves a 13.2-fold increase in H2 evolution rate compared to pristine g-C3N4. This synthesized O,F-g-C3N4 is then dispersed in waterborne polyurethane (WPU) to create an anti-corrosive coating for Q235 carbon steel substrates. Water resistance, mechanical property, and electrochemical characterization analyses reveal that the O,F-g-C3N4/WPU composite coating exhibits remarkable corrosion resistance with a high protection efficiency of 90.23%. This work offers a straightforward approach for developing highly efficient g-C3N4-based photocatalysts and corrosion-resistant coatings.

THE INTEGRATION OF ARTIFICIAL INTELLIGENCE (AI) INTO EDUCATION SYSTEMS AND ITS IMPACT ON THE GOVERNANCE OF HIGHER EDUCATION INSTITUTIONS

Objective: The research aims to explore the integration of Artificial Intelligence (AI) within educational systems and analyze its impact on the governance of higher education institutions (HEIs), particularly focusing on decision-making, data protection, and administrative efficiency. Theoretical Framework: The article presents key theories on the transformative role of AI in educational governance, particularly focusing on how AI-driven data analysis and automation enhance decision-making and administrative efficiency. It also addresses theories related to ethical governance, emphasizing data protection and equitable access within higher education institutions. Method: The research methodology in this article is based on a qualitative approach, combining a review of existing literature with case studies of AI implementation in educational contexts. This approach provides in-depth insights into the effects of AI on governance within higher education institutions. Results and Discussion: The research findings highlight that AI integration in higher education governance improves decision-making and operational efficiency through data-driven insights and automation. However, it also reveals challenges, particularly in data protection, ethical concerns, and shifting power dynamics within institutions. The study emphasizes the need for responsible and transparent AI governance to ensure balanced benefits across stakeholders. Research Implications: This research underscores the need for higher education institutions to adopt AI responsibly, balancing its potential to enhance governance and decision-making with rigorous ethical standards, especially in data privacy and equity. It calls on policymakers and administrators to develop frameworks that ensure AI-driven processes remain transparent, inclusive, and aligned with educational values. Originality/Value: The originality of this research lies in its focus on how AI specifically transforms governance in higher education institutions, going beyond general applications of AI in education to address ethical, operational, and decision-making challenges unique to institutional governance. It provides a nuanced perspective on balancing innovation with responsibility in an academic setting.

An epoxy resin-based superhydrophobic coating incorporating pH-responsive functional multiwall carbon nanotubes assembled L-proline for corrosion protection

Purpose This paper aims to improve the corrosion resistance of AH36 carbon steel, an epoxy resin (EP)-based superhydrophobic coating was prepared on the surface of AH36 carbon steel. Design/methodology/approach The hydroxylated multi-walled carbon nanotubes were used as nanocontainers, and the corrosion inhibitor L-proline was loaded by negative pressure method and then modified it with 3-aminopropyltriethoxysilane and 3-mercaptopropyltrimethoxysilane, got functionalized hydroxy carbon nanotubes (KH-CNTs@LP). The KH-CNTs@LP was mixed with the EP, and the KH-CNTs@LP/EP superhydrophobic coating was successfully prepared on the surface of the AH36 carbon steel matrix by spraying. Findings The results showed that the water contact angle of the KH-CNTs@LP/EP superhydrophobic coating is 155.2° and the rolling angle is 5°. The KH-CNTs@LP/EP superhydrophobic coating had a good corrosion resistance in the pH = 4 corrosion environment, |Z|0.01 Hz was 7.21 × 107 Ω·cm2. Originality/value The KH-CNTs@LP/EP superhydrophobic coating is pH-responsive and releases L-proline, which increased the impedance of the coating and can effectively improve the protection efficiency of the coating on the metal. The active protection is provided by loaded L-proline inhibitor from KH-CNTs@LP, whereas the passive protection is achieved through the water rejection of superhydrophobic surfaces.

Adaptive current protection for three‐phase short‐circuit faults in active distribution networks

AbstractTo address the impact of distributed generation (DG) access on the traditional protection configuration methods of distribution networks (DNs) and to facilitate the swift and effective protection of lines by protection devices under fault conditions, an adaptive current protection method for three‐phase short‐circuit faults in active distribution networks (ADNs), based on local information, is proposed. Initially, the applicability issues of traditional protection are examined, and the limitations of the existing protection scheme in ADNs are highlighted. Subsequently, the fault characteristics of ADNs are analysed, taking into account the output characteristics of DGs under short‐circuit faults, which form the foundation for the proposed protection method. Following this, an adaptive current protection method based on local information is introduced, utilizing a dual criterion of phase and magnitude to adjust line protection, with a specific implementation strategy for the protection scheme provided. Finally, the proposed protection scheme is validated using PSCAD/EMTDC simulation software, with results demonstrating that the scheme enables rapid and efficient protection action under fault conditions across the entire line.

Industrial Land Protection and Allocation Efficiency: Evidence from Guangdong, China

Industrial land allocation in China has been distorted for a long time by local governments providing land at a low price to attract manufacturing activities. This study explores whether an industrial land protection policy can reduce the distortions and, hence, improve land allocation efficiency in China. Using industrial land zoning and protection policies adopted in some cities in Guangdong province, this study finds that industrial land allocation efficiency is indeed improved after the implementation of protection policies, reflected in higher land prices and greater land use intensity. However, the improvement is smaller for industrial land provided to advanced manufacturing industries, indicating that local governments continue to rely on a strategy of offering cheap land to compete for high-end manufacturing activities. Further analysis suggests that the adoption of industrial land protection in one region generates a positive spillover effect on industrial land allocation efficiency in neighboring regions. Overall, this study provides new evidence on the effectiveness of industrial land protection.

Dynamic response analysis of ancient pagodas under rockfall impact

In order to protect the precious cultural heritage of the pagoda in the mountainous area from the damage caused by falling rocks, we provide targeted and effective research support and protection strategy basis. ABAQUS finite element analysis software is used to accurately simulate and analyze the response of the pagoda under the impact load of falling rocks. Firstly, the geometric modeling of the tower structure is carried out in a meticulous manner to ensure that the model accurately reflects the real shape and structural characteristics of the tower, and the material properties are assigned to it rigorously and accurately, so as to construct a finite element model that is highly adapted to the actual situation. Subsequently, the impacts of falling rocks on the pagoda under different working conditions, such as different velocities, radii, impact angles and impact heights, are comprehensively and systematically simulated to assess the structural safety and stability of the pagoda from all angles. This paper clearly reveals that the velocity, radius, impact angle and impact height of falling stones are the core key position in the structural safety assessment of the pagoda, and they are the decisive factors affecting the structural safety of the pagoda. These findings not only deepen the scientific knowledge of the response mechanism of the pagoda under the impact of falling rocks, but also provide a solid theoretical foundation and a clear direction for the subsequent development of accurate and efficient protection measures against falling rocks.

`Evaluation of the antimicrobial corrosion properties of electropolymerized poly(aniline-co-o-toluidine) films on carbon steel surfaces

Microbiologically influenced corrosion (MIC) can lead to structural weakening and shortened service life of carbon steel, resulting in serious economic losses and safety hazards. In particular, sulfate-reducing bacteria (SRB) produce hydrogen sulfide and sulfide during their growth and metabolism, which accelerates the corrosion of carbon steel. Thin films of poly(aniline-co-o-toluidine) (PA-co-POT) were electrodeposited on the surface of carbon steel using cyclic voltammetry in an electrolyte consisting of oxalic acid, aniline and o-toluidine monomers. The mechanical properties of the polymer films were analyzed by a micro-Vickers hardness tester. The corrosion resistance of the polymer films was evaluated by an electrochemical corrosion test and immersion test of the polymer films in a solution containing SRB and 3.5% NaCl. The results showed that PA-co-POT films have superior SRB corrosion resistance than single polymer films. The corrosion rate of PA-co-POT film was 0.0171mm/year, and the protection efficiency was 83% after 14 days of immersion in solution. In addition, due to the antibacterial properties of the PA-co-POT film, the adhesion of bacteria on its surface is significantly reduced, and local corrosion is also effectively inhibited. This study demonstrates the potential of electropolymerized aniline derivative copolymer films in preventing MIC of carbon steel and provides valuable insights for the development of new corrosion protection materials.

Assessment of immunogenicity and protective efficiency of multi-epitope antigen-loaded in mannan decorated PLGA nanoparticles against tuberculosis

The antigen-targeting to dendritic cells (DCs) has gained increasing attention as the potential approach for immunotherapy in recent years due to the ability of DCs to regulate innate and adaptive immunity. In the present study, the immunogenicity and protective efficiency of mannan-decorated PLGA nanoparticles (NPs) loaded with multi-epitopes mycobacterium tuberculosis antigen (HspX-Ppe44-EsxV) were evaluated as a targeted delivery system to DCs. For this purpose, PLGA nanoparticle formulations were prepared and subsequently decorated by mannan. The physicochemical properties and level of mannan incorporation, as well as encapsulation efficiency and antigen release, were assessed. The potential of formulated NPs for antigen targeting to DCs, and immunogenicity against tuberculosis (TB) were investigated using immunofluorescence assay and in-vivo experiments. Mannan incorporation enhanced the uptake of fusion-loaded PLGA by DCs. The cytokine and antibody assays demonstrated that mannosylation of NPs and BCG-primed mice boosted by mannan-PLGA could significantly elevate Th1-biased immune responses relative to the BCG and non-modified PLGA NPs. Our findings also proved that the mannosylated vaccine in the presence of CpG could evoke Th1 and Th17 responses with appropriate protective efficiency against TB in mice. This result illustrated that the active targeting of DCs by mannan-PLGA NPs could induce a proper anti-tuberculosis response, which is essential for protection against tuberculosis.

Say No to Freeloader: Protecting Intellectual Property of Your Deep Model.

Model intellectual property (IP) protection has gained attention due to the significance of safeguarding intellectual labor and computational resources. Ensuring IP safety for trainers and owners is critical, especially when ownership verification and applicability authorization are required. A notable approach involves preventing the transfer of well-trained models from authorized to unauthorized domains. We introduce a novel Compact Un-transferable Pyramid Isolation Domain (CUPI-Domain) which serves as a barrier against illegal transfers from authorized to unauthorized domains. Inspired by human transitive inference, the CUPI-Domain emphasizes distinctive style features of the authorized domain, leading to failure in recognizing irrelevant private style features on unauthorized domains. To this end, we propose CUPI-Domain generators, which select features from both authorized and CUPI-Domain as anchors. These generators fuse the style features and semantic features to create labeled, style-rich CUPI-Domain. Additionally, we design external Domain-Information Memory Banks (DIMB) for storing and updating labeled pyramid features to obtain stable domain class features and domain class-wise style features. Based on the proposed whole method, the novel style and discriminative loss functions are designed to effectively enhance the distinction in style and discriminative features between authorized and unauthorized domains. We offer two solutions for utilizing CUPI-Domain based on whether the unauthorized domain is known: target-specified CUPI-Domain and target-free CUPI-Domain. Comprehensive experiments on various public datasets demonstrate the effectiveness of our CUPI-Domain approach with different backbone models, providing an efficient solution for model intellectual property protection.

Selecting the Best Power Generation Technologies by Using Multi Criteria Decision Making Analysis

The increasing demand for electric power is prompting engineers to consider sustainable energy production systems in Europe. Challenges include energy supply security, affordability, material efficiency, and environmental protection. Based on a number of variables, this study seeks to determine which sustainable technologies are most effective for producing electricity. Numerous competing criteria are present in the sources of energy production; multi-criteria decision-making methods (MCDM) were applied, and the analysis was conducted using the MULTIMOORA, VIKOR, and TOPSIS methodologies. The results of the MULTI MOORA method revealed the best biomass (CHP) power plants; via VIKOR, the best technology for producing electricity was condensing turbine coal; and for TOPSIS, the best technology was solar photovoltaics. These findings demonstrated that future energy policy should be focused on sustainable energy technologies.

Bio-based waterborne polyurethanes from castor oil, sorbitan monooleate and sodium lignosulfonate with ultraviolet resistance, photothermal effect, corrosion protection and degradation properties

The advancement of bio-based materials derived from renewable resources provides a pivotal strategic approach to address the problems of environmental pollution and scarce fossil resources. In this study, a series of bio-based waterborne polyurethanes (WPUs) with enhanced UV resistance, photothermal effect and corrosion resistance were prepared by using sorbitan monooleate (SP) and castor oil (CO) as vegetable polyols together with the introduction of sodium lignosulfonate modified of diethanolamine (DML). The WPU coatings of only 100 μm thickness, exhibited UV blocking rate > 99 % between 200 and 320 nm. Furthermore, the synthesized WPUs had superior adhesion to aluminum, tinplate, and PVC surface, with adhesion to tinplate of up to 5B and hardness of up to 3H. Additionally, the WPU coatings showed favorable photothermal effect when exposed to 1.05 W/cm2 of near-infrared light irradiation, with maximum surface temperature of 93 °C. The WPU coatings demonstrated noteworthy corrosion protection, with high corrosion protection efficiency of 96.97 % on tinplate. This study presents a new strategy for the synthesis of bio-based WPUs with excellent ultraviolet resistance, favorable photothermal effect, corrosion protection, and degradability. The unique properties lay the foundation for the applications of bio-based WPUs in the field of industrial coatings.

Ricinus communis leaves extract as a green corrosion inhibitor for carbon steel in hydrochloric acid solution

The eco-friendliness of Ricinus communis leaves extract as an inhibitor for carbon steel (CS) corrosion was evaluated using weight loss (WL) as a chemical technique, and some electrochemical methods like AC electrochemical impedance spectroscopy (EIS), Tafel polarization (PP), and electrochemical frequency modulation (EFM). The data acquired showed that the higher the dose of the extract, the higher the protection efficiency (% IE), which increases with increasing temperature from 80.5 at 25 °C to 91.4 % at 45 °C. Using adsorption isotherms, adsorption factors were determined. Activation parameters were calculated and discussed based on Arrhenius and transition state principles. The adsorption procedure of Ricinus communis leaves extract on CS surface was found to be spontaneous and follows Langmuir's isotherm. This extract is a mixed type according to polarization data. Based on EIS data, it was shown that the extract of Ricinus communis leaves decreased the capacitance double layer (Cdl) from 539 to 74 μF cm−2 while enhancing the charge transfer resistance (Rct) from 70 to 430.5 Ω cm2. Surface analysis was done using Fourier transform infrared spectroscopy (FT-IR), scanning electron microscopy (SEM), and atomic force microscopy (AFM) to measure the degree of surface roughness, film formation, and adsorbed groups on the CS surface. According to these tests, a layer of extract molecules forms on the CS surface.

Fabrication of highly stable and durable wood materials by modification of polyacrylamide (PAM)-glyoxal (GLY)

Facile and efficient protection strategies to improve wood dimensional stability and resistance to mold and termite are urgently needed in the architectural constructional materials market. In this study, polyacrylamide (PAM)-glyoxal (GLY) system impregnation and thermal curing were used to modify Scots pine wood. The results showed that the average anti-swelling efficacy (ASE) of 160-AGE, 160-AGEP, and 200-AGE modified wood was 36.09 %, 26.67 % and 19.00 % in volume, respectively. Compared with the untreated wood, the modified wood exhibited better mold resistance. Furthermore, the modified wood samples show higher termite mortality and lower mass losses, indicating good termite resistance. Among them, the anti-mold efficacy in 200-AGE was 91.10 %, and the termite resistance rating in 160-AGE was 9.2. The modulus of elasticity (MOE) of the modified wood sample was 16–25 % higher than that of the untreated wood. Obtained by infrared spectrum and electron microscope analysis, the acrylamide polymer penetrates into the wood cell cavities and forms polyacrylamide, which is crosslinked to wood cell wall -OH by glyoxal. This study can prove that the polyacrylamide-glyoxal system modifier has great potential as a modifier to improve the mold resistance and dimensional stability of wood.

Experimental study and theoretical analysis on mechanical properties of prestressed bolted glulam connections under cyclic loading

Due to the development of assembled buildings and public environmental awareness, glulam structures have been widely concerned nowadays which have the advantages in terms of energy efficiency and environmental protection, compared with concrete and steel. However, the beam-to-column connections connected by bolts with slotted-in plates in glulam frame structures generally have some disadvantages, such as the low load-bearing capacity, low stiffness, low ductility, and poor energy dissipation capacity. To improve the mechanical performances of conventional glulam beam-to-column connections against seismic effect, a prestressed bolted glulam connection was proposed in this paper. Twelve connection specimens from four groups were tested and numerically studied under cyclic loading. The results show that the application of prestressing force can improve the brittle failure of connections. Compared with the traditional glulam bolted connections, the application of prestressing force can improve the load-bearing capacity, energy dissipation capacity, ductility and initial stiffness of the connection, and slow down the stiffness and strength degradation. However, excessive prestressing may cause an early failure of the connection. The numerical analysis shows that the bolt diameter and the number of steel bars have significant positive influence on the load-bearing capacity of the connection. Even though increasing bolt diameter would be more efficient for the mechanical behavior of the connection, the transverse splitting failure of glulam would be more likely to occur. A calculation formula for the load-bearing capacity and a theoretical model for the moment-rotation relationship of the prestressed bolted glulam beam-column connections are proposed respectively for practical design. The rotation behavior evaluation of the prestressed bolted glulam beam-column connections indicates that the proposed connections are classified as semi-rigid connections, which can be used for ductility design.

Enhancement of calcium alginate and urea in gel-modified dry water inhibition of methane-air explosion

Methane has a wide range of applications in several industries. However, it also exhibits flammable and explosive properties, which pose a potential hazard. This study used calcium alginate to make ordinary dry water powder have a stable network gel structure, and urea was added to enhance further dry water powder’s chemical inhibition. A visual test system verified the explosion suppression effect of gel-modified dry water powder on the methane-air explosion. The results show that the optimal parameters for Ordinary dry water preparation were as follows: mass ratio of SiO2 to H2O = 9:100, stirring speed = 5000 r/min, stirring time = 240 s. The powder concentration for the best explosion suppression effect is 0.52 g/L. 10 mass% Urea-modified dry water, which achieves high explosion suppression efficiency in the methane-air explosion system by cooling and endothermic suppressing the explosion reaction. The spatial distribution of Calcium alginate gel urea modified dry water hinders the propagation of the flame. Urea continuously produces nitride at different temperatures, and nitride competes for O2 and OH· Free radicals, thus destroying the methane-air explosion chain reaction. Calcium alginate gel urea (10 mass%) modified dry water of 0.52 g/L has the best explosion suppression efficiency, which reduces the flame propagation velocity of methane-air explosion system by 42.48 %, the suppression efficiency of flame temperature reaches 40 %, and the suppression effect on explosion relief pressure reaches 16 %. Calcium alginate gel urea modified dry water, a new explosion suppression material, significantly improve the explosion suppression effect of methane-air explosions, which can not only improve the industrial safety of methane-containing processes, extend equipment life, and reduce production costs but also help improve environmental protection and resource utilization efficiency by inhibiting methane explosions. This study helps to promote the development of gas explosion suppression materials and has practical significance for safe energy utilization and industrial methane applications.

Long-term trends (2002–2016) reveal an increase of mercury levels along with the decline of several metal elements in striped dolphins (Stenella coeruleoalba) stranded in the North-West Mediterranean

The determination of 18 metals and metalloids was realized in 4 tissues of 62 Stenella coeruleoalba specimens stranded along the French Mediterranean coastline from 2010 to 2016. While most concentrations were comparable to mean worldwide levels, Hg levels were alarming (1190 μg g−1 dw, in average). The results were discussed together with previous measurements in the same area, from 2002 to 2009. The elements Ni and Pb (−81 % and −88 % in liver in 2010–16 compared to 2002–09), and Cd (−40 % in kidney in 2010–16 compared to 2002–09) as well as V (−79 % in liver in 2013–16 compared to 2010–12), showed promising decreasing trends, and the decrease of Zn and Cu levels below baseline values could indicate a global decreasing burden of metal contaminants. In contrary, Hg dramatically increased in dolphins since 2007 (+135 % in liver in 2010–16 compared to 2002–09), regardless of total length. On the other hand, Se levels increased only slightly since 2012, potentially not offering anymore an efficient protection against Hg, with mean Se-to-Hg molar ratios below unity in most tissues (0.26, 0.56, 1.81, and 0.57 in liver, kidney, lung and muscle, respectively).

Terminalia bellirica fruit shell extract by microwave assisted extraction as a green inhibitor for mild steel acid corrosion: insight from chemical, electrochemical and computational studies

In the current study, the corrosion protection role of ethanol extract of Terminalia bellirica fruit shell on Mild Steel (MS) in 0.5 M HCl solution was studied by using weight loss, Tafel plot, AC impedance and surface techniques. The existence of functional groups in the plant extract was confirmed with the aid of FT-IR spectroscopy technique. The presence of 31.12% of gallic acid in the Terminalia bellirica fruit shell extract was complemented with HPLC and LCMS results. The surface coverage and protection efficiency of Terminalia bellirica fruit shell extract were enhanced with its concentration and declined with solution temperature. The activation parameters such as activation enthalpy, entropy and change in Gibb’s free energy are related to adsorption process were calculated and discussed. The adsorption of Terminalia bellirica fruit shell extract was found to obey the Langmuir adsorption model. The process of adsorption of inhibitor molecules on the metal surface can be verified by using UV–Visible spectroscopy technique. The potentiodynamic polarization and impedance results suggest that, Terminalia bellirica fruit shell extract functioned by adsorption at metal (MS)-Corrodent (0.5 M HCl) interface, which blocks the both cathodic and anodic half reactions of the MS corrosion process. Theoretical approach by Monte Carlo (MC) simulations and quantum chemical study support the experimental findings and adsorption of extract of Terminalia bellirica fruit shell molecules on MS surface.

Enhancing oxygen‐blocking properties of HfB2‐MoSi2‐SiC coating by CeO2 modification

AbstractTo alleviate the destructive alteration of the glass layer surface caused by gas evolution during the oxygen‐blocking process of the HfB2‐MoSi2‐SiC coating, CeO2 was incorporated to modify HfB2‐MoSi2‐SiC coating, and the anti‐oxidation mechanism at 1700°C in air was investigated. Compared with the unmodified HfB2‐MoSi2‐SiC coating, the addition of the refractory CeO2 to the Hf‐B‐Si‐O system leads to the formation of a stable Hf‐Ce‐B‐Si‐O complex phase glass, which substantially enhances the viscosity, stability, and self‐healing sealing properties of the glass layer. The introduction of 0.75 vol.% CeO2 significantly lowers the oxidative activity of the HfB2‐MoSi2‐SiC coating, boosting its average protective efficiency to 99.96% and reducing the maximal oxygen permeability by 43.48%, thus exhibiting superior oxygen‐blocking performance. However, excessive addition of CeO2 leads to an overabundance of oxygen release through its distinctive oxygen vacancy mechanism, which accelerates the formation of Hf‐oxides, resulting in excessive viscosity on the coating surface and leaving oxidation defects unrepaired.

Oxidation protection efficiency of the combination of Minthostachys mollis K. and Origanum vulgare L. essential oils with "chain-breaking" and "termination-enhancing" antioxidant mechanisms.

The use of antioxidants is known to reduce lipid oxidation. This study aimed to assess the interaction of two antioxidant mechanisms, namely, "chain-breaking" and "termination-enhancing" by combining natural antioxidants derived from "oregano" (Origanum vulgare L.) and "peperina" (Minthostachys mollis K.) essential oils (EOs) in an accelerated oxidation process of sunflower oil at 60°C. Concentrations of 0.05% w/w (1) and 0.02% w/w (2) of the combined oregano and peperina EOs were evaluated. Chemical and volatile oxidation markers were determined in comparison with the pure compounds, an antioxidant-free control, and a BHT-treated sample (0.02% w/w). Although the combinations exhibited lower oxidation indicator values (Anisidine≈136) compared to the control (Anisidine≈213), no evidence of a synergistic effect was observed (Anisidine: Oregano 1≈52; Oregano 2≈199; Peperina 1≈155; Peperina 2≈153), indicating that the combination did not enhance their antioxidant activity beyond that of the pure EOs. Thus, evaluating these combinations in other food matrices is important. PRACTICAL APPLICATION: Food oxidation is one of the main causes of food spoilage, and the search for natural antioxidants has become a necessity for society's increasing food knowledge and consumption preference. The research is focused on demonstrating that not only natural phenolic compounds with a "chain-breaking" mechanism have efficient antioxidant activity but also non-phenolic terpenes using the "termination enhancer" mechanism are efficient, but also the combination of them, which provides more alternative antioxidants for industrial applications.